package com.example.test2018131566.controller;

import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

public class LoginInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o) throws Exception {
        String reqPath = httpServletRequest.getServletPath();
        // 只有返回true才会继续向下执行，返回false取消当前请求
        HttpSession session = httpServletRequest.getSession();
        if (session == null || session.getAttribute("user") == null ) {
            //httpServletResponse.setStatus(HttpStatus.UNAUTHORIZED.value());
            httpServletResponse.sendRedirect("/");
            return false;
        }
        return true;
    }
    @Override
    public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {
    }
    @Override
    public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {
    }

}
